As time passes, many individuals report that their days seem to shorten, and the years appear to accelerate after reaching a certain age. This perception of time is not merely a nostalgic feeling but is supported by scientific studies suggesting that time is experienced subjectively rather than objectively. In childhood, experiences are abundant and varied, making time seem lengthy, while in adulthood, the repetition of daily routines leads to fewer distinct memories being formed, contributing to the sensation that time flies by.

The brain's internal mechanisms for processing memories and experiences change as one ages. As life progresses, the brain begins to compress memories and routine stimuli become commonplace, leading to a decrease in the richness of daily experiences. This compression results in fewer markers in one's memory, which makes time feel like it passes more quickly. The differences in how time is perceived between childhood and adulthood highlight the psychological aspects of temporal perception and memory management.

Understanding these phenomena offers potential strategies for individuals to alter their experience of time, even in adulthood. By seeking new experiences and breaking routines, individuals can potentially enhance their memory formation and perception of time, making the years feel less fleeting. This knowledge has implications for personal development and mental well-being, encouraging people to actively engage with their time to enjoy a more fulfilling experience of their lives.